Influence of Hydrothermal Temperature on Structures and Photovoltaic Properties of SnO2 Nanoparticles

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• 作者：Yang Liu ; Jihua Yang ; Wensheng Yang ; Tengfeng Xie ; Yubai Bai and Tiejin Li
• 关键词：hydrothermal synthesis ; nanoparticles ; surface photovoltage ; spectroscopy ; surface state
• 刊名：Journal of Nanoparticle Research
• 出版年：2000
• 出版时间：2000
• 年：2000
• 卷：2
• 期：3
• 页码：309-313
• 全文大小：KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nanotechnology
  Inorganic Chemistry
  Characterization and Evaluation Materials
  Physical Chemistry
  Applied Optics, Optoelectronics and Optical Devices
  
• 出版者：Springer Netherlands
• ISSN：1572-896X

文摘

Two SnO₂ nanoparticles were synthesized by hydrothermal method at 170°C and 180°C, respectively. Transmission electron microscope observations reveal that the diameters of both the nanoparticles are around 6nm. At the same time, surface photovoltage spectroscopy measurements show that the nanoparticle synthesized at 180°C has more surface electronic states at 0.3eV below the conduction band than the one synthesized at 170°C. This means that the temperatures chosen in hydrothermal synthesis have significant influence on the surface electronic characteristics of resultant SnO2 nanoparticles but the effect on their sizes is not obvious. However, after being calcined at 500°C for 2h, the diameter of the nanoparticle synthesized at 180°C increased to 23nm and that of the nanoparticle synthesized at 170°C increased to 32nm as calculated from X-ray diffraction pattern.